This is the 800th most frequent Portuguese word.
km
"Km" in Portuguese means "kilometer," a unit of distance equal to 1,000 meters.
In this sentence, 'km' refers to a unit of measurement indicating the distance run daily.
Eu corro 5 km todos os dias.
I run 5 km every day.
Here, 'km' indicates the distance between two geographic locations.
A cidade fica a 20 km de distância.
The city is 20 km away.
In this context, 'km' specifies the length of the swimming course in the competition.